> If you’ve made more than 10,000 USD (approximately 7,800 GBP) in sales on Etsy in a 12-month period [...] you’ll be required to participate for the lifetime of your shop That's not exactly what I think when I read "biggest sellers". That seems like a remarkably low cutoff. Also, if you don't need/want to grow and/or you have low margins, this could wipe you out. 12% revenue of _any_ orders within a 30 day period of…
Pay a few pennies, make 12% of the sale.